Originally Posted by lasbar
Adolf was part of an union before switching to the other side...
If you want details, here goes. Hitler was a military man around 1918-1919. He was charged with the surveillance of fringe nationalist parties, especially the DAP. But after attending their meetings, instead of disrupting the DAP he quickly became a member and the rising star of that minuscule party. This is how he started his carreer. I have never read any historical account of his being part of a union.
He never "switched sides" either. He was already pretty nationalist and antisemitic when he was young before the First World War and kept these beliefs all his life. What is true, though is that the original doctrine of the DAP (soon renamed "NSDAP") included both nationalist points and a critique of capitalism. Hitler himself, as far as we can tell from his writings, never adhered to that last part. He got rid of the "anti-capitalist" crowd in the NSDAP as soon as he started to control it (end of the 1920s with the eviction of the Strasser brothers and the betrayal of Goebbels who switched sides to become one of Hitler's closest allies inside the party), although he never bothered to change the name of the NSDAP and kept the increasingly irrelevant "socialist" part of "national-socialist". That's also when he started actively courting big business leaders who would fund his political operations.
I always laugh when ignorant partisan hacks try to tell me that the NSDAP was "socialist" (it's usually used as an insult somehow: "if Hitler's party had 'socialist' in tis name then surely socialism is bad"). Just a couple books about the NSDAP history and doctrine would be enough to dispell this historical fallacy.